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Table 2: Airflow data (CFM)
Blower
Models
motor speed
Unit
0.1
CFM
1100
High (5)
W
113
CFM
1025
Medium High (4)
W
95
CFM
925
JMET08B
Medium (3)
W
78
CFM
850
Medium Low (2)
W
63
CFM
575
Low (1)
W
32
CFM
1300
High (5)
W
177
CFM
1475
Medium High (4)
W
259
CFM
1150
JMET12B
Medium (3)
W
118
CFM
1025
Medium Low (2)
W
94
CFM
750
Low (1)
W
51
CFM
1675
High (5)
W
294
CFM
1500
Medium High (4)
W
216
CFM
1350
JMET12C
Medium (3)
W
153
CFM
1075
Medium Low (2)
W
87
CFM
950
Low (1)
W
67
CFM
2075
High (5)
W
501
CFM
1875
Medium High (4)
W
374
CFM
1500
JMET16C
Medium (3)
W
197
CFM
1325
Medium Low (2)
W
132
CFM
1050
Low (1)
W
79
CFM
2250
High (5)
W
595
CFM
2075
Medium High (4)
W
444
CFM
1875
JMET18D
Medium (3)
W
329
CFM
1450
Medium Low (2)
W
153
CFM
1300
Low (1)
W
120
Notes:
1.
No electric heat installed
2.
Air handler units are tested to UL60335-2-40 standards up to 0.6 in. W.C. external static pressure.
3.
Dry coil conditions only; tested without filters
4.
For optimal performance, external static pressures of 0.2 in. W.C. to 0.5 in. W.C. are recommended. Heating applications are tested at 0.5 in. W.C. external static pres-
sure.
5.
Airflow data shown is from testing performed at 230 V. JMET units use a standard ECM constant torque motor and there is minimal variation of airflow at other distribu-
tion voltage values. The above data can be used for airflow at other distribution voltages.
External static pressure (in. W.C.)
0.2
0.3
0.4
0.5
0.6
0.7
0.8
1050
1000
925
875
825
775
725
122
131
140
149
158
167
176
975
900
850
800
750
675
625
104
112
120
129
137
145
154
875
800
750
700
625
575
500
85
93
100
108
115
123
130
775
725
650
575
525
450
—
70
77
83
90
96
103
—
500
425
—
—
—
—
—
38
44
—
—
—
—
—
1250
1225
1175
1125
1075
1025
1000
184
192
201
212
223
235
249
1425
1400
1375
1325
1300
1250
1225
266
275
285
296
308
322
336
1075
1025
975
925
875
800
750
129
139
150
160
171
181
192
975
900
850
800
725
675
625
103
113
122
132
141
151
160
675
600
525
450
400
—
—
57
64
70
77
84
—
—
1650
1625
1575
1550
1525
1475
1425
303
314
326
339
353
369
386
1475
1450
1400
1375
1325
1250
1200
225
235
247
259
273
288
304
1325
1275
1225
1175
1100
1025
975
165
178
190
203
216
228
241
1000
925
850
775
700
625
550
96
105
114
123
131
140
149
875
800
725
650
575
500
425
78
88
97
105
113
120
127
2050
2000
1975
1950
1925
1900
1875
516
531
546
560
575
590
605
1850
1825
1775
1750
1725
1675
1650
388
402
415
429
443
456
470
1475
1425
1400
1350
1300
1250
1175
210
223
236
249
262
276
289
1250
1200
1125
1075
1000
950
875
144
155
166
178
189
200
212
975
900
825
750
650
575
500
88
96
105
114
122
131
140
2225
2200
2175
2125
2100
2075
2050
606
618
633
648
666
685
705
2050
2000
1975
1950
1900
1875
1850
460
475
491
506
522
537
553
1850
1800
1775
1725
1700
1650
1625
344
359
374
389
404
419
434
1400
1325
1250
1200
1125
1050
1000
166
179
192
206
219
232
245
1225
1150
1075
1000
925
850
800
131
143
154
166
178
189
201
Clearances
It is essential to provide the following clearances:
• Maintenance and servicing access - minimum 36 in. from the front
0.9
1.0
of the unit for blower motor
675
600
• The supply air ductwork connected to this unit is designed for 1 in.
clearance for the first 18 in. of duct length to combustible materials.
185
194
• A combustible floor base accessory is available for downflow appli-
575
500
cations of this unit, if required by local code.
162
171
450
400
External duct static
138
145
To determine total external system static pressure, complete the
—
—
following:
—
—
1. Drill a hole 12 in. away from the air handler in the supply air duct. You
—
—
must take the return air pressure reading between the indoor coil and
the air handler.
—
—
950
900
2. Measure the supply air static pressure. Record this positive
number.
263
279
3. Measure the return air static pressure. Record this negative
1200
1150
number.
351
367
4. Treat the negative number as a positive, and add the two numbers
700
650
together to determine the total external system static pressure.
202
213
550
500
170
179
Table 3: Electrical heat - minimum fan speed (XAH)
—
—
Heater kit
—
—
1,2
models
1375
1325
8HK(0,1)6500206
404
424
1125
1050
8HK(0,1)6500506
322
341
8HK(0,1)6500806
900
800
8HK(0,1)6501006
8HK06501025
253
266
475
425
8HK(1,2)6501506
8HK06501525
158
167
8HK(1,2)6502006
—
—
8HK16502025
—
—
8HK(1,2)6502506
1850
1825
8HK16502525
620
634
1625
1600
1. (0,1) - 0 = no service disconnect or 1 = with service disconnect
2. (1,2) - 1 = with service disconnect, no breaker jumper bar or 2 = with service disconnect and breaker jumper bar
484
497
3. For one-phase 8HK not approved for horizontal right with heat pump applications
1100
1025
Table 4: Electrical heat with heat pump: minimum fan speed (XAF)
302
315
800
750
1 2
Heater kit models
223
234
8HK(0,1)6500206
425
—
8HK(0,1)6500506
148
—
8HK(0,1)6500806
2025
2000
727
751
8HK(0,1)6501006
8HK06501025
1800
1775
568
584
8HK(1,2)6501506
8HK06501525
1575
1525
8HK(1,2)6502006
449
463
8HK16502025
925
850
8HK(1,2)6502506
258
271
8HK16502525
725
650
212
224
1. (0,1) - 0 = no service disconnect or 1 = with service disconnect
2. (1,2) - 1 = with service disconnect, no breaker jumper bar or 2 = with service disconnect and breaker jumper bar
3. -2006 max ESP is 0.4 in., three-phase 8HK not approved for downflow applications. -2025 cannot be used with heat pump applications.
Figure 2: Duct static measurements
Air handler models
Nominal kW
at 240 V
JMET08B
JMET12B
JMET12C
2.4
High (5)
High (5)
4.8
High (5)
High (5)
7.7
High (5)
High (5)
9.6
3
High (5)
High (5)
14.4
—
High (5)
19.2
—
High (5)
24
—
—
Air handler models
Nominal kW
at 240 V
JMET08B
JMET12B
JMET12C
2.4
Medium (3)
High (5)
High (5)
4.8
Medium (3)
High (5)
High (5)
7.7
Medium (3)
High (5)
High (5)
9.6
Medium (3)
High (5)
High (5)
14.4
—
High (5)
High (5)
19.2
—
High (5)
High (5)
24
—
—
—
JMET16C
JMET18D
High (5)
Medium high (4)
Medium (3)
High (5)
Medium high (4)
Medium (3)
High (5)
Medium high (4)
Medium (3)
High (5)
Medium high (4)
Medium (3)
High (5)
Medium high (4)
Medium (3)
High (5)
Medium high (4)
Medium (3)
—
—
Medium (3)
JMET16C
JMET18D
Medium (3)
Medium (3)
Medium (3)
Medium (3)
Medium (3)
Medium (3)
Medium (3)
Medium (3)
Medium (3)
Medium (3)
3
Medium high (4)
Medium (3)
—
Medium (3)
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